Improvement in mill-spindle steps



rigid .tt

GEORGE s. YOUNG, oE GLEEEIELD, PENNSYLVANIA, AssIeNon To EIM- sELE AND Ar. rrrcn BoYNToN, or VSAME PLAGE.

Letters Patent No. 110,814, dated January 3, 1871.

IMPRovEMENT iN MILL-SPINDLE s TEPs.

The Schedule referred to in these Letters Patent and making part o "the same.

To all whom. tt may concern Be it known that LGEORGE S. YOUNG, of the town and county of Clearfield, in the State of Pennsylvania, have invented certain new and useful 1mprovementsin Mill-Spindle Steps; and I do here` by declare that the following is-a full, clear, and exact description thereof, reference being had to the accom; panying drawing through letters of reference marked.

The ordinary method of supporting a mill-spindle is by a step seated on a beam extending from side to side ot the frame-work, and made adjustable by wedges o r set-screws at one or both ends.

lhe objections to such construction are, first, that in elevating the step to compensate for wear, and to adjust ,the runner to a proper distance from the vbeds'tone to grind fine or coarse, the step is very liable to be tipped to one side, causing it to wind upon the toe of the shaft and wear nnevenly; secondly, Athat the running stone always has a tendency to one side owing to the lateral action of its driving-gear, there-A by cutting the cavity inthe step, in course of time, to an oval form, which causes the bed-stoncand runner to grind tiner on one side than on theopposite. v

' To remedy these diiculties is the object of my invention, which consists in the construction of a step that may-be connccted'rigidly to a stationaryportion of the mill-frame and be adjustable vertically without destroying its perpendicular position, and in such manner that in the adjustment of the step vertically it is caused to rotate and present a fresh bearing portion of its interior to the side of the toe in the direction of its-lateral tendency; also, in combining with such adjustable step a cap or case,` to exclude the dust from the interior portions.

Referring to thev drawing- 'A represents theportion of my step, `.whiclris rigidly attached to the lower` beam of the mill-frame. This portion represents a flanged socket having a female screw-thread on its interior, and one or more vertical grooves,` a, on its outer periphery.

Within this socket is fitted, by a corresponding male screw, the adjustable step B, the interior of which may be a cylindrical cavity from top to bottom, or it may have one or more shoulders, f, enlarging it upwardly, as represented in lig. 2.

The upper end ofthe step Bis enlarged in diameter, i

and on lthe periphery of this portion are formed teeth g, to gear with the worm-wheel C, by the rotation of which the step is caused to rotate on its own'axis, and, at the same time', to rise or fall by means of thel screw on its lower portion and on the interior of the socket A. l

D represents the coverof the step, which ts closely around the socket A, and in spline gear therewith,

by means of its feather e'and the groove a.

This cover has an aperture, d, in the top for the passage of the mill-spindle, and lug c on the side to carry the spindle b vof'the worm-wheel, which gears through an aperture inthe cover with the teeth g, on the enlarged collar or upper portion of the step B.'

Thus it will be seen that, by *rotating the wormwheel C, the step B will be both rotated and elevated or depressed, as may be, while the cover D -will rise or fall with the step; but, being in spline gear with the socket will not rotate, thus obtaining the desirable results hereinbefore mentioned.

Vhat is here claimed as new, and desired to be selcured by Letters Patent, is'- The combination of the worm-wheel O, carried by the cover D, with the step B and socket A, all constructed and arranged to operate substantially as shown and described.

GEO. S. YOUNG. I

Witnesses:

SYDNEY E. Stura, W. Monats SMITH. 

